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Abstract <p>Two Cd(II)-based coordination polymers (Cd-CPs), named {[Cd(casb)(bbibpy)]·2H<sub>2</sub>O}<sub><i>n</i></sub> (Cd-CP-<b>1</b>) and [Cd(bpydb)(bbibpy)(H<sub>2</sub>O)]<sub><i>n</i></sub> (Cd-CP-<b>2</b>), were successfully constructed under the condition of solvothermal (H<sub>2</sub>casb is 4-((carboxylatoethyl)sulfanyl)benzoic acid, H<sub>2</sub>bpydb is 4,4'-(4,2'-bipyridine-2,6-diyl)dibenzoic acid, bbibpy is 5,5'-bis(benzimidazol-2-yl)-2,2′-bipyridine]. Cd-CP-<b>1</b> and Cd-CP-<b>2</b> were characterized by X-ray single-crystal diffraction, elemental analysis and thermogravimetric (TG) analysis. X‑ray single crystal diffraction analysis reveals that Cd-CP-<b>1</b> has a one-dimensional (1D) ladder structure and crystallizes in the triclinic system, space group <i>P</i>-1, and Cd-CP-<b>2</b> has a 1D chain structure and crystallizes in the monoclinic system, space group <i>P</i>2<sub>1</sub>/<i>c</i>. Furthermore, the fluorescence quenching experimental results showed that Cd-CP-<b>1</b> and Cd-CP-<b>2</b> exhibit selective fluorescence sensing nitrobenzene. The concentration-fluorescence experimental results showed that the detection limits of two complexes for nitrobenzene are 6.54&#xa0;× 10<sup>–6</sup> M, 1.17 × 10<sup>–7</sup> M based on 3σ/<i>K</i><sub>sv</sub>, respectively.</p>

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Syntheses, Structure, and Fluorescent Probes for Sensitive Detection for Nitrobenzene of Two Cd(II) Coordination Polymers

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • Feng Li,
  • Ying Huang,
  • Yongle Gan,
  • Wei Lu,
  • Chuanze Zhong,
  • Tongwei Zhang,
  • Liansheng Cui

摘要

Abstract

Two Cd(II)-based coordination polymers (Cd-CPs), named {[Cd(casb)(bbibpy)]·2H2O}n (Cd-CP-1) and [Cd(bpydb)(bbibpy)(H2O)]n (Cd-CP-2), were successfully constructed under the condition of solvothermal (H2casb is 4-((carboxylatoethyl)sulfanyl)benzoic acid, H2bpydb is 4,4'-(4,2'-bipyridine-2,6-diyl)dibenzoic acid, bbibpy is 5,5'-bis(benzimidazol-2-yl)-2,2′-bipyridine]. Cd-CP-1 and Cd-CP-2 were characterized by X-ray single-crystal diffraction, elemental analysis and thermogravimetric (TG) analysis. X‑ray single crystal diffraction analysis reveals that Cd-CP-1 has a one-dimensional (1D) ladder structure and crystallizes in the triclinic system, space group P-1, and Cd-CP-2 has a 1D chain structure and crystallizes in the monoclinic system, space group P21/c. Furthermore, the fluorescence quenching experimental results showed that Cd-CP-1 and Cd-CP-2 exhibit selective fluorescence sensing nitrobenzene. The concentration-fluorescence experimental results showed that the detection limits of two complexes for nitrobenzene are 6.54 × 10–6 M, 1.17 × 10–7 M based on 3σ/Ksv, respectively.